Intermediate SQL

Intermediate SQL

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1. Grouping

In this section, you will learn how to group and manage data effectively. We will introduce the GROUP BY operator for grouping data. Additionally, you will learn how to filter grouped data using the HAVING operator.

Order of Statements

Total Ride Time for Each Subway Line Challenge

Average Student's Grade Challenge

Searching for the Top Math Students Challenge

Several Aggregate Functions in the Query

More Complex Filtering

2. Nested Subqueries

You will learn about nested subqueries, how to create them, and how to use them effectively.

Non-tech Department Employees Challenge

Using Inner Subqueries in the FROM Section

Employees With More Than Average Salary Challenge

Combining Table Results

3. Joining Tables

Here, you will learn how to combine multiple tables, allowing you to work with a unified table and simplify query creation.

Get Category By Product Price

Get Minimum Price By Category

Get Product Amount By Category

LEFT, RIGHT and INNER JOINs

Table Join Practice

FULL JOIN Usage

4. DDL and DML in SQL

Learn the fundamentals of Data Definition Language (DDL) and Data Manipulation Language (DML) in SQL, including how to create, modify, and delete database objects, as well as how to insert, update, and delete data within tables.

CREATE and Constraints

ALTER and INSERT Operations

DROP and TRUNCATE

UPDATE and DELETE

Non-tech Department Employees Challenge

In this chapter, you will work with the employees and department tables.

Here's how they look:

employees:

department:

Task

Let's move on to practice!

Your task is to retrieve the first name, last name, and salary of those employees who work in non-technical departments. To do this, use an inner query where you write the filtering using a WHERE clause. You also need to sort the results by salary, from highest to lowest. Use the ORDER BY clause to accomplish this subtask.

Task

Let's move on to practice!

Your task is to retrieve the first name, last name, and salary of those employees who work in non-technical departments. To do this, use an inner query where you write the filtering using a WHERE clause. You also need to sort the results by salary, from highest to lowest. Use the ORDER BY clause to accomplish this subtask.

Everything was clear?

Section 2. Chapter 2

toggle bottom row

Non-tech Department Employees Challenge

In this chapter, you will work with the employees and department tables.

Here's how they look:

employees:

department:

Task

Let's move on to practice!

Your task is to retrieve the first name, last name, and salary of those employees who work in non-technical departments. To do this, use an inner query where you write the filtering using a WHERE clause. You also need to sort the results by salary, from highest to lowest. Use the ORDER BY clause to accomplish this subtask.

Task

Let's move on to practice!

Your task is to retrieve the first name, last name, and salary of those employees who work in non-technical departments. To do this, use an inner query where you write the filtering using a WHERE clause. You also need to sort the results by salary, from highest to lowest. Use the ORDER BY clause to accomplish this subtask.

Everything was clear?

Section 2. Chapter 2

toggle bottom row

Non-tech Department Employees Challenge

In this chapter, you will work with the employees and department tables.

Here's how they look:

employees:

department:

Task

Let's move on to practice!

Your task is to retrieve the first name, last name, and salary of those employees who work in non-technical departments. To do this, use an inner query where you write the filtering using a WHERE clause. You also need to sort the results by salary, from highest to lowest. Use the ORDER BY clause to accomplish this subtask.

Task

Let's move on to practice!

Your task is to retrieve the first name, last name, and salary of those employees who work in non-technical departments. To do this, use an inner query where you write the filtering using a WHERE clause. You also need to sort the results by salary, from highest to lowest. Use the ORDER BY clause to accomplish this subtask.

Everything was clear?

In this chapter, you will work with the employees and department tables.

Here's how they look:

employees:

department:

Task

Let's move on to practice!

Your task is to retrieve the first name, last name, and salary of those employees who work in non-technical departments. To do this, use an inner query where you write the filtering using a WHERE clause. You also need to sort the results by salary, from highest to lowest. Use the ORDER BY clause to accomplish this subtask.

Section 2. Chapter 2

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